/*
 * Shared descriptors for aead, ablkcipher algorithms
 *
 * Copyright 2016 NXP
 */

#include "compat.h"
#include "desc_constr.h"
#include "caamalg_desc.h"

/*
 * For aead functions, read payload and write payload,
 * both of which are specified in req->src and req->dst
 */
static inline void aead_append_src_dst(u32 *desc, u32 msg_type)
{
	append_seq_fifo_store(desc, 0, FIFOST_TYPE_MESSAGE_DATA | KEY_VLF);
	append_seq_fifo_load(desc, 0, FIFOLD_CLASS_BOTH |
			     KEY_VLF | msg_type | FIFOLD_TYPE_LASTBOTH);
}

/* Set DK bit in class 1 operation if shared */
static inline void append_dec_op1(u32 *desc, u32 type)
{
	u32 *jump_cmd, *uncond_jump_cmd;

	/* DK bit is valid only for AES */
	if ((type & OP_ALG_ALGSEL_MASK) != OP_ALG_ALGSEL_AES) {
		append_operation(desc, type | OP_ALG_AS_INITFINAL |
				 OP_ALG_DECRYPT);
		return;
	}

	jump_cmd = append_jump(desc, JUMP_TEST_ALL | JUMP_COND_SHRD);
	append_operation(desc, type | OP_ALG_AS_INITFINAL |
			 OP_ALG_DECRYPT);
	uncond_jump_cmd = append_jump(desc, JUMP_TEST_ALL);
	set_jump_tgt_here(desc, jump_cmd);
	append_operation(desc, type | OP_ALG_AS_INITFINAL |
			 OP_ALG_DECRYPT | OP_ALG_AAI_DK);
	set_jump_tgt_here(desc, uncond_jump_cmd);
}

/**
 * cnstr_shdsc_aead_null_encap - IPSec ESP encapsulation shared descriptor
 *                               (non-protocol) with no (null) encryption.
 * @desc: pointer to buffer used for descriptor construction
 * @adata: pointer to authentication transform definitions. Note that since a
 *         split key is to be used, the size of the split key itself is
 *         specified. Valid algorithm values - one of OP_ALG_ALGSEL_{MD5, SHA1,
 *         SHA224, SHA256, SHA384, SHA512} ANDed with OP_ALG_AAI_HMAC_PRECOMP.
 * @icvsize: integrity check value (ICV) size (truncated or full)
 *
 * Note: Requires an MDHA split key.
 */
void cnstr_shdsc_aead_null_encap(u32 * const desc, struct alginfo *adata,
				 unsigned int icvsize)
{
	u32 *key_jump_cmd, *read_move_cmd, *write_move_cmd;

	init_sh_desc(desc, HDR_SHARE_SERIAL);

	/* Skip if already shared */
	key_jump_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
				   JUMP_COND_SHRD);
	if (adata->key_inline)
		append_key_as_imm(desc, adata->key_virt, adata->keylen_pad,
				  adata->keylen, CLASS_2 | KEY_DEST_MDHA_SPLIT |
				  KEY_ENC);
	else
		append_key(desc, adata->key_dma, adata->keylen, CLASS_2 |
			   KEY_DEST_MDHA_SPLIT | KEY_ENC);
	set_jump_tgt_here(desc, key_jump_cmd);

	/* assoclen + cryptlen = seqinlen */
	append_math_sub(desc, REG3, SEQINLEN, REG0, CAAM_CMD_SZ);

	/* Prepare to read and write cryptlen + assoclen bytes */
	append_math_add(desc, VARSEQINLEN, ZERO, REG3, CAAM_CMD_SZ);
	append_math_add(desc, VARSEQOUTLEN, ZERO, REG3, CAAM_CMD_SZ);

	/*
	 * MOVE_LEN opcode is not available in all SEC HW revisions,
	 * thus need to do some magic, i.e. self-patch the descriptor
	 * buffer.
	 */
	read_move_cmd = append_move(desc, MOVE_SRC_DESCBUF |
				    MOVE_DEST_MATH3 |
				    (0x6 << MOVE_LEN_SHIFT));
	write_move_cmd = append_move(desc, MOVE_SRC_MATH3 |
				     MOVE_DEST_DESCBUF |
				     MOVE_WAITCOMP |
				     (0x8 << MOVE_LEN_SHIFT));

	/* Class 2 operation */
	append_operation(desc, adata->algtype | OP_ALG_AS_INITFINAL |
			 OP_ALG_ENCRYPT);

	/* Read and write cryptlen bytes */
	aead_append_src_dst(desc, FIFOLD_TYPE_MSG | FIFOLD_TYPE_FLUSH1);

	set_move_tgt_here(desc, read_move_cmd);
	set_move_tgt_here(desc, write_move_cmd);
	append_cmd(desc, CMD_LOAD | DISABLE_AUTO_INFO_FIFO);
	append_move(desc, MOVE_SRC_INFIFO_CL | MOVE_DEST_OUTFIFO |
		    MOVE_AUX_LS);

	/* Write ICV */
	append_seq_store(desc, icvsize, LDST_CLASS_2_CCB |
			 LDST_SRCDST_BYTE_CONTEXT);

#ifdef DEBUG
	print_hex_dump(KERN_ERR,
		       "aead null enc shdesc@" __stringify(__LINE__)": ",
		       DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
#endif
}
EXPORT_SYMBOL(cnstr_shdsc_aead_null_encap);

/**
 * cnstr_shdsc_aead_null_decap - IPSec ESP decapsulation shared descriptor
 *                               (non-protocol) with no (null) decryption.
 * @desc: pointer to buffer used for descriptor construction
 * @adata: pointer to authentication transform definitions. Note that since a
 *         split key is to be used, the size of the split key itself is
 *         specified. Valid algorithm values - one of OP_ALG_ALGSEL_{MD5, SHA1,
 *         SHA224, SHA256, SHA384, SHA512} ANDed with OP_ALG_AAI_HMAC_PRECOMP.
 * @icvsize: integrity check value (ICV) size (truncated or full)
 *
 * Note: Requires an MDHA split key.
 */
void cnstr_shdsc_aead_null_decap(u32 * const desc, struct alginfo *adata,
				 unsigned int icvsize)
{
	u32 *key_jump_cmd, *read_move_cmd, *write_move_cmd, *jump_cmd;

	init_sh_desc(desc, HDR_SHARE_SERIAL);

	/* Skip if already shared */
	key_jump_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
				   JUMP_COND_SHRD);
	if (adata->key_inline)
		append_key_as_imm(desc, adata->key_virt, adata->keylen_pad,
				  adata->keylen, CLASS_2 |
				  KEY_DEST_MDHA_SPLIT | KEY_ENC);
	else
		append_key(desc, adata->key_dma, adata->keylen, CLASS_2 |
			   KEY_DEST_MDHA_SPLIT | KEY_ENC);
	set_jump_tgt_here(desc, key_jump_cmd);

	/* Class 2 operation */
	append_operation(desc, adata->algtype | OP_ALG_AS_INITFINAL |
			 OP_ALG_DECRYPT | OP_ALG_ICV_ON);

	/* assoclen + cryptlen = seqoutlen */
	append_math_sub(desc, REG2, SEQOUTLEN, REG0, CAAM_CMD_SZ);

	/* Prepare to read and write cryptlen + assoclen bytes */
	append_math_add(desc, VARSEQINLEN, ZERO, REG2, CAAM_CMD_SZ);
	append_math_add(desc, VARSEQOUTLEN, ZERO, REG2, CAAM_CMD_SZ);

	/*
	 * MOVE_LEN opcode is not available in all SEC HW revisions,
	 * thus need to do some magic, i.e. self-patch the descriptor
	 * buffer.
	 */
	read_move_cmd = append_move(desc, MOVE_SRC_DESCBUF |
				    MOVE_DEST_MATH2 |
				    (0x6 << MOVE_LEN_SHIFT));
	write_move_cmd = append_move(desc, MOVE_SRC_MATH2 |
				     MOVE_DEST_DESCBUF |
				     MOVE_WAITCOMP |
				     (0x8 << MOVE_LEN_SHIFT));

	/* Read and write cryptlen bytes */
	aead_append_src_dst(desc, FIFOLD_TYPE_MSG | FIFOLD_TYPE_FLUSH1);

	/*
	 * Insert a NOP here, since we need at least 4 instructions between
	 * code patching the descriptor buffer and the location being patched.
	 */
	jump_cmd = append_jump(desc, JUMP_TEST_ALL);
	set_jump_tgt_here(desc, jump_cmd);

	set_move_tgt_here(desc, read_move_cmd);
	set_move_tgt_here(desc, write_move_cmd);
	append_cmd(desc, CMD_LOAD | DISABLE_AUTO_INFO_FIFO);
	append_move(desc, MOVE_SRC_INFIFO_CL | MOVE_DEST_OUTFIFO |
		    MOVE_AUX_LS);
	append_cmd(desc, CMD_LOAD | ENABLE_AUTO_INFO_FIFO);

	/* Load ICV */
	append_seq_fifo_load(desc, icvsize, FIFOLD_CLASS_CLASS2 |
			     FIFOLD_TYPE_LAST2 | FIFOLD_TYPE_ICV);

#ifdef DEBUG
	print_hex_dump(KERN_ERR,
		       "aead null dec shdesc@" __stringify(__LINE__)": ",
		       DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
#endif
}
EXPORT_SYMBOL(cnstr_shdsc_aead_null_decap);

static void init_sh_desc_key_aead(u32 * const desc,
				  struct alginfo * const cdata,
				  struct alginfo * const adata,
				  const bool is_rfc3686, u32 *nonce)
{
	u32 *key_jump_cmd;
	unsigned int enckeylen = cdata->keylen;

	/* Note: Context registers are saved. */
	init_sh_desc(desc, HDR_SHARE_SERIAL | HDR_SAVECTX);

	/* Skip if already shared */
	key_jump_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
				   JUMP_COND_SHRD);

	/*
	 * RFC3686 specific:
	 *	| key = {AUTH_KEY, ENC_KEY, NONCE}
	 *	| enckeylen = encryption key size + nonce size
	 */
	if (is_rfc3686)
		enckeylen -= CTR_RFC3686_NONCE_SIZE;

	if (adata->key_inline)
		append_key_as_imm(desc, adata->key_virt, adata->keylen_pad,
				  adata->keylen, CLASS_2 |
				  KEY_DEST_MDHA_SPLIT | KEY_ENC);
	else
		append_key(desc, adata->key_dma, adata->keylen, CLASS_2 |
			   KEY_DEST_MDHA_SPLIT | KEY_ENC);

	if (cdata->key_inline)
		append_key_as_imm(desc, cdata->key_virt, enckeylen,
				  enckeylen, CLASS_1 | KEY_DEST_CLASS_REG);
	else
		append_key(desc, cdata->key_dma, enckeylen, CLASS_1 |
			   KEY_DEST_CLASS_REG);

	/* Load Counter into CONTEXT1 reg */
	if (is_rfc3686) {
		append_load_as_imm(desc, nonce, CTR_RFC3686_NONCE_SIZE,
				   LDST_CLASS_IND_CCB |
				   LDST_SRCDST_BYTE_OUTFIFO | LDST_IMM);
		append_move(desc,
			    MOVE_SRC_OUTFIFO |
			    MOVE_DEST_CLASS1CTX |
			    (16 << MOVE_OFFSET_SHIFT) |
			    (CTR_RFC3686_NONCE_SIZE << MOVE_LEN_SHIFT));
	}

	set_jump_tgt_here(desc, key_jump_cmd);
}

/**
 * cnstr_shdsc_aead_encap - IPSec ESP encapsulation shared descriptor
 *                          (non-protocol).
 * @desc: pointer to buffer used for descriptor construction
 * @cdata: pointer to block cipher transform definitions
 *         Valid algorithm values - one of OP_ALG_ALGSEL_{AES, DES, 3DES} ANDed
 *         with OP_ALG_AAI_CBC or OP_ALG_AAI_CTR_MOD128.
 * @adata: pointer to authentication transform definitions. Note that since a
 *         split key is to be used, the size of the split key itself is
 *         specified. Valid algorithm values - one of OP_ALG_ALGSEL_{MD5, SHA1,
 *         SHA224, SHA256, SHA384, SHA512} ANDed with OP_ALG_AAI_HMAC_PRECOMP.
 * @icvsize: integrity check value (ICV) size (truncated or full)
 * @is_rfc3686: true when ctr(aes) is wrapped by rfc3686 template
 * @nonce: pointer to rfc3686 nonce
 * @ctx1_iv_off: IV offset in CONTEXT1 register
 *
 * Note: Requires an MDHA split key.
 */
void cnstr_shdsc_aead_encap(u32 * const desc, struct alginfo *cdata,
			    struct alginfo *adata, unsigned int icvsize,
			    const bool is_rfc3686, u32 *nonce,
			    const u32 ctx1_iv_off)
{
	/* Note: Context registers are saved. */
	init_sh_desc_key_aead(desc, cdata, adata, is_rfc3686, nonce);

	/* Class 2 operation */
	append_operation(desc, adata->algtype | OP_ALG_AS_INITFINAL |
			 OP_ALG_ENCRYPT);

	/* Read and write assoclen bytes */
	append_math_add(desc, VARSEQINLEN, ZERO, REG3, CAAM_CMD_SZ);
	append_math_add(desc, VARSEQOUTLEN, ZERO, REG3, CAAM_CMD_SZ);

	/* Skip assoc data */
	append_seq_fifo_store(desc, 0, FIFOST_TYPE_SKIP | FIFOLDST_VLF);

	/* read assoc before reading payload */
	append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS2 | FIFOLD_TYPE_MSG |
				      FIFOLDST_VLF);

	/* Load Counter into CONTEXT1 reg */
	if (is_rfc3686)
		append_load_imm_be32(desc, 1, LDST_IMM | LDST_CLASS_1_CCB |
				     LDST_SRCDST_BYTE_CONTEXT |
				     ((ctx1_iv_off + CTR_RFC3686_IV_SIZE) <<
				      LDST_OFFSET_SHIFT));

	/* Class 1 operation */
	append_operation(desc, cdata->algtype | OP_ALG_AS_INITFINAL |
			 OP_ALG_ENCRYPT);

	/* Read and write cryptlen bytes */
	append_math_add(desc, VARSEQINLEN, SEQINLEN, REG0, CAAM_CMD_SZ);
	append_math_add(desc, VARSEQOUTLEN, SEQINLEN, REG0, CAAM_CMD_SZ);
	aead_append_src_dst(desc, FIFOLD_TYPE_MSG1OUT2);

	/* Write ICV */
	append_seq_store(desc, icvsize, LDST_CLASS_2_CCB |
			 LDST_SRCDST_BYTE_CONTEXT);

#ifdef DEBUG
	print_hex_dump(KERN_ERR, "aead enc shdesc@" __stringify(__LINE__)": ",
		       DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
#endif
}
EXPORT_SYMBOL(cnstr_shdsc_aead_encap);

/**
 * cnstr_shdsc_aead_decap - IPSec ESP decapsulation shared descriptor
 *                          (non-protocol).
 * @desc: pointer to buffer used for descriptor construction
 * @cdata: pointer to block cipher transform definitions
 *         Valid algorithm values - one of OP_ALG_ALGSEL_{AES, DES, 3DES} ANDed
 *         with OP_ALG_AAI_CBC or OP_ALG_AAI_CTR_MOD128.
 * @adata: pointer to authentication transform definitions. Note that since a
 *         split key is to be used, the size of the split key itself is
 *         specified. Valid algorithm values - one of OP_ALG_ALGSEL_{MD5, SHA1,
 *         SHA224, SHA256, SHA384, SHA512} ANDed with OP_ALG_AAI_HMAC_PRECOMP.
 * @ivsize: initialization vector size
 * @icvsize: integrity check value (ICV) size (truncated or full)
 * @is_rfc3686: true when ctr(aes) is wrapped by rfc3686 template
 * @nonce: pointer to rfc3686 nonce
 * @ctx1_iv_off: IV offset in CONTEXT1 register
 *
 * Note: Requires an MDHA split key.
 */
void cnstr_shdsc_aead_decap(u32 * const desc, struct alginfo *cdata,
			    struct alginfo *adata, unsigned int ivsize,
			    unsigned int icvsize, const bool geniv,
			    const bool is_rfc3686, u32 *nonce,
			    const u32 ctx1_iv_off)
{
	/* Note: Context registers are saved. */
	init_sh_desc_key_aead(desc, cdata, adata, is_rfc3686, nonce);

	/* Class 2 operation */
	append_operation(desc, adata->algtype | OP_ALG_AS_INITFINAL |
			 OP_ALG_DECRYPT | OP_ALG_ICV_ON);

	/* Read and write assoclen bytes */
	append_math_add(desc, VARSEQINLEN, ZERO, REG3, CAAM_CMD_SZ);
	if (geniv)
		append_math_add_imm_u32(desc, VARSEQOUTLEN, REG3, IMM, ivsize);
	else
		append_math_add(desc, VARSEQOUTLEN, ZERO, REG3, CAAM_CMD_SZ);

	/* Skip assoc data */
	append_seq_fifo_store(desc, 0, FIFOST_TYPE_SKIP | FIFOLDST_VLF);

	/* read assoc before reading payload */
	append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS2 | FIFOLD_TYPE_MSG |
			     KEY_VLF);

	if (geniv) {
		append_seq_load(desc, ivsize, LDST_CLASS_1_CCB |
				LDST_SRCDST_BYTE_CONTEXT |
				(ctx1_iv_off << LDST_OFFSET_SHIFT));
		append_move(desc, MOVE_SRC_CLASS1CTX | MOVE_DEST_CLASS2INFIFO |
			    (ctx1_iv_off << MOVE_OFFSET_SHIFT) | ivsize);
	}

	/* Load Counter into CONTEXT1 reg */
	if (is_rfc3686)
		append_load_imm_be32(desc, 1, LDST_IMM | LDST_CLASS_1_CCB |
				     LDST_SRCDST_BYTE_CONTEXT |
				     ((ctx1_iv_off + CTR_RFC3686_IV_SIZE) <<
				      LDST_OFFSET_SHIFT));

	/* Choose operation */
	if (ctx1_iv_off)
		append_operation(desc, cdata->algtype | OP_ALG_AS_INITFINAL |
				 OP_ALG_DECRYPT);
	else
		append_dec_op1(desc, cdata->algtype);

	/* Read and write cryptlen bytes */
	append_math_add(desc, VARSEQINLEN, SEQOUTLEN, REG0, CAAM_CMD_SZ);
	append_math_add(desc, VARSEQOUTLEN, SEQOUTLEN, REG0, CAAM_CMD_SZ);
	aead_append_src_dst(desc, FIFOLD_TYPE_MSG);

	/* Load ICV */
	append_seq_fifo_load(desc, icvsize, FIFOLD_CLASS_CLASS2 |
			     FIFOLD_TYPE_LAST2 | FIFOLD_TYPE_ICV);

#ifdef DEBUG
	print_hex_dump(KERN_ERR, "aead dec shdesc@" __stringify(__LINE__)": ",
		       DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
#endif
}
EXPORT_SYMBOL(cnstr_shdsc_aead_decap);

/**
 * cnstr_shdsc_aead_givencap - IPSec ESP encapsulation shared descriptor
 *                             (non-protocol) with HW-generated initialization
 *                             vector.
 * @desc: pointer to buffer used for descriptor construction
 * @cdata: pointer to block cipher transform definitions
 *         Valid algorithm values - one of OP_ALG_ALGSEL_{AES, DES, 3DES} ANDed
 *         with OP_ALG_AAI_CBC or OP_ALG_AAI_CTR_MOD128.
 * @adata: pointer to authentication transform definitions. Note that since a
 *         split key is to be used, the size of the split key itself is
 *         specified. Valid algorithm values - one of OP_ALG_ALGSEL_{MD5, SHA1,
 *         SHA224, SHA256, SHA384, SHA512} ANDed with OP_ALG_AAI_HMAC_PRECOMP.
 * @ivsize: initialization vector size
 * @icvsize: integrity check value (ICV) size (truncated or full)
 * @is_rfc3686: true when ctr(aes) is wrapped by rfc3686 template
 * @nonce: pointer to rfc3686 nonce
 * @ctx1_iv_off: IV offset in CONTEXT1 register
 *
 * Note: Requires an MDHA split key.
 */
void cnstr_shdsc_aead_givencap(u32 * const desc, struct alginfo *cdata,
			       struct alginfo *adata, unsigned int ivsize,
			       unsigned int icvsize, const bool is_rfc3686,
			       u32 *nonce, const u32 ctx1_iv_off)
{
	u32 geniv, moveiv;

	/* Note: Context registers are saved. */
	init_sh_desc_key_aead(desc, cdata, adata, is_rfc3686, nonce);

	if (is_rfc3686)
		goto copy_iv;

	/* Generate IV */
	geniv = NFIFOENTRY_STYPE_PAD | NFIFOENTRY_DEST_DECO |
		NFIFOENTRY_DTYPE_MSG | NFIFOENTRY_LC1 |
		NFIFOENTRY_PTYPE_RND | (ivsize << NFIFOENTRY_DLEN_SHIFT);
	append_load_imm_u32(desc, geniv, LDST_CLASS_IND_CCB |
			    LDST_SRCDST_WORD_INFO_FIFO | LDST_IMM);
	append_cmd(desc, CMD_LOAD | DISABLE_AUTO_INFO_FIFO);
	append_move(desc, MOVE_WAITCOMP |
		    MOVE_SRC_INFIFO | MOVE_DEST_CLASS1CTX |
		    (ctx1_iv_off << MOVE_OFFSET_SHIFT) |
		    (ivsize << MOVE_LEN_SHIFT));
	append_cmd(desc, CMD_LOAD | ENABLE_AUTO_INFO_FIFO);

copy_iv:
	/* Copy IV to class 1 context */
	append_move(desc, MOVE_SRC_CLASS1CTX | MOVE_DEST_OUTFIFO |
		    (ctx1_iv_off << MOVE_OFFSET_SHIFT) |
		    (ivsize << MOVE_LEN_SHIFT));

	/* Return to encryption */
	append_operation(desc, adata->algtype | OP_ALG_AS_INITFINAL |
			 OP_ALG_ENCRYPT);

	/* Read and write assoclen bytes */
	append_math_add(desc, VARSEQINLEN, ZERO, REG3, CAAM_CMD_SZ);
	append_math_add(desc, VARSEQOUTLEN, ZERO, REG3, CAAM_CMD_SZ);

	/* Skip assoc data */
	append_seq_fifo_store(desc, 0, FIFOST_TYPE_SKIP | FIFOLDST_VLF);

	/* read assoc before reading payload */
	append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS2 | FIFOLD_TYPE_MSG |
			     KEY_VLF);

	/* Copy iv from outfifo to class 2 fifo */
	moveiv = NFIFOENTRY_STYPE_OFIFO | NFIFOENTRY_DEST_CLASS2 |
		 NFIFOENTRY_DTYPE_MSG | (ivsize << NFIFOENTRY_DLEN_SHIFT);
	append_load_imm_u32(desc, moveiv, LDST_CLASS_IND_CCB |
			    LDST_SRCDST_WORD_INFO_FIFO | LDST_IMM);
	append_load_imm_u32(desc, ivsize, LDST_CLASS_2_CCB |
			    LDST_SRCDST_WORD_DATASZ_REG | LDST_IMM);

	/* Load Counter into CONTEXT1 reg */
	if (is_rfc3686)
		append_load_imm_be32(desc, 1, LDST_IMM | LDST_CLASS_1_CCB |
				     LDST_SRCDST_BYTE_CONTEXT |
				     ((ctx1_iv_off + CTR_RFC3686_IV_SIZE) <<
				      LDST_OFFSET_SHIFT));

	/* Class 1 operation */
	append_operation(desc, cdata->algtype | OP_ALG_AS_INITFINAL |
			 OP_ALG_ENCRYPT);

	/* Will write ivsize + cryptlen */
	append_math_add(desc, VARSEQOUTLEN, SEQINLEN, REG0, CAAM_CMD_SZ);

	/* Not need to reload iv */
	append_seq_fifo_load(desc, ivsize,
			     FIFOLD_CLASS_SKIP);

	/* Will read cryptlen */
	append_math_add(desc, VARSEQINLEN, SEQINLEN, REG0, CAAM_CMD_SZ);
	append_seq_fifo_load(desc, 0, FIFOLD_CLASS_BOTH | KEY_VLF |
			     FIFOLD_TYPE_MSG1OUT2 | FIFOLD_TYPE_LASTBOTH);
	append_seq_fifo_store(desc, 0, FIFOST_TYPE_MESSAGE_DATA | KEY_VLF);

	/* Write ICV */
	append_seq_store(desc, icvsize, LDST_CLASS_2_CCB |
			 LDST_SRCDST_BYTE_CONTEXT);

#ifdef DEBUG
	print_hex_dump(KERN_ERR,
		       "aead givenc shdesc@" __stringify(__LINE__)": ",
		       DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
#endif
}
EXPORT_SYMBOL(cnstr_shdsc_aead_givencap);

/**
 * cnstr_shdsc_gcm_encap - gcm encapsulation shared descriptor
 * @desc: pointer to buffer used for descriptor construction
 * @cdata: pointer to block cipher transform definitions
 *         Valid algorithm values - OP_ALG_ALGSEL_AES ANDed with OP_ALG_AAI_GCM.
 * @icvsize: integrity check value (ICV) size (truncated or full)
 */
void cnstr_shdsc_gcm_encap(u32 * const desc, struct alginfo *cdata,
			   unsigned int icvsize)
{
	u32 *key_jump_cmd, *zero_payload_jump_cmd, *zero_assoc_jump_cmd1,
	    *zero_assoc_jump_cmd2;

	init_sh_desc(desc, HDR_SHARE_SERIAL);

	/* skip key loading if they are loaded due to sharing */
	key_jump_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
				   JUMP_COND_SHRD | JUMP_COND_SELF);
	if (cdata->key_inline)
		append_key_as_imm(desc, cdata->key_virt, cdata->keylen,
				  cdata->keylen, CLASS_1 | KEY_DEST_CLASS_REG);
	else
		append_key(desc, cdata->key_dma, cdata->keylen, CLASS_1 |
			   KEY_DEST_CLASS_REG);
	set_jump_tgt_here(desc, key_jump_cmd);

	/* class 1 operation */
	append_operation(desc, cdata->algtype | OP_ALG_AS_INITFINAL |
			 OP_ALG_ENCRYPT);

	/* if assoclen + cryptlen is ZERO, skip to ICV write */
	append_math_sub(desc, VARSEQOUTLEN, SEQINLEN, REG0, CAAM_CMD_SZ);
	zero_assoc_jump_cmd2 = append_jump(desc, JUMP_TEST_ALL |
						 JUMP_COND_MATH_Z);

	/* if assoclen is ZERO, skip reading the assoc data */
	append_math_add(desc, VARSEQINLEN, ZERO, REG3, CAAM_CMD_SZ);
	zero_assoc_jump_cmd1 = append_jump(desc, JUMP_TEST_ALL |
					   JUMP_COND_MATH_Z);

	append_math_add(desc, VARSEQOUTLEN, ZERO, REG3, CAAM_CMD_SZ);

	/* skip assoc data */
	append_seq_fifo_store(desc, 0, FIFOST_TYPE_SKIP | FIFOLDST_VLF);

	/* cryptlen = seqinlen - assoclen */
	append_math_sub(desc, VARSEQOUTLEN, SEQINLEN, REG3, CAAM_CMD_SZ);

	/* if cryptlen is ZERO jump to zero-payload commands */
	zero_payload_jump_cmd = append_jump(desc, JUMP_TEST_ALL |
					    JUMP_COND_MATH_Z);

	/* read assoc data */
	append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS1 | FIFOLDST_VLF |
			     FIFOLD_TYPE_AAD | FIFOLD_TYPE_FLUSH1);
	set_jump_tgt_here(desc, zero_assoc_jump_cmd1);

	append_math_sub(desc, VARSEQINLEN, SEQINLEN, REG0, CAAM_CMD_SZ);

	/* write encrypted data */
	append_seq_fifo_store(desc, 0, FIFOST_TYPE_MESSAGE_DATA | FIFOLDST_VLF);

	/* read payload data */
	append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS1 | FIFOLDST_VLF |
			     FIFOLD_TYPE_MSG | FIFOLD_TYPE_LAST1);

	/* jump the zero-payload commands */
	append_jump(desc, JUMP_TEST_ALL | 2);

	/* zero-payload commands */
	set_jump_tgt_here(desc, zero_payload_jump_cmd);

	/* read assoc data */
	append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS1 | FIFOLDST_VLF |
			     FIFOLD_TYPE_AAD | FIFOLD_TYPE_LAST1);

	/* There is no input data */
	set_jump_tgt_here(desc, zero_assoc_jump_cmd2);

	/* write ICV */
	append_seq_store(desc, icvsize, LDST_CLASS_1_CCB |
			 LDST_SRCDST_BYTE_CONTEXT);

#ifdef DEBUG
	print_hex_dump(KERN_ERR, "gcm enc shdesc@" __stringify(__LINE__)": ",
		       DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
#endif
}
EXPORT_SYMBOL(cnstr_shdsc_gcm_encap);

/**
 * cnstr_shdsc_gcm_decap - gcm decapsulation shared descriptor
 * @desc: pointer to buffer used for descriptor construction
 * @cdata: pointer to block cipher transform definitions
 *         Valid algorithm values - OP_ALG_ALGSEL_AES ANDed with OP_ALG_AAI_GCM.
 * @icvsize: integrity check value (ICV) size (truncated or full)
 */
void cnstr_shdsc_gcm_decap(u32 * const desc, struct alginfo *cdata,
			   unsigned int icvsize)
{
	u32 *key_jump_cmd, *zero_payload_jump_cmd, *zero_assoc_jump_cmd1;

	init_sh_desc(desc, HDR_SHARE_SERIAL);

	/* skip key loading if they are loaded due to sharing */
	key_jump_cmd = append_jump(desc, JUMP_JSL |
				   JUMP_TEST_ALL | JUMP_COND_SHRD |
				   JUMP_COND_SELF);
	if (cdata->key_inline)
		append_key_as_imm(desc, cdata->key_virt, cdata->keylen,
				  cdata->keylen, CLASS_1 | KEY_DEST_CLASS_REG);
	else
		append_key(desc, cdata->key_dma, cdata->keylen, CLASS_1 |
			   KEY_DEST_CLASS_REG);
	set_jump_tgt_here(desc, key_jump_cmd);

	/* class 1 operation */
	append_operation(desc, cdata->algtype | OP_ALG_AS_INITFINAL |
			 OP_ALG_DECRYPT | OP_ALG_ICV_ON);

	/* if assoclen is ZERO, skip reading the assoc data */
	append_math_add(desc, VARSEQINLEN, ZERO, REG3, CAAM_CMD_SZ);
	zero_assoc_jump_cmd1 = append_jump(desc, JUMP_TEST_ALL |
						 JUMP_COND_MATH_Z);

	append_math_add(desc, VARSEQOUTLEN, ZERO, REG3, CAAM_CMD_SZ);

	/* skip assoc data */
	append_seq_fifo_store(desc, 0, FIFOST_TYPE_SKIP | FIFOLDST_VLF);

	/* read assoc data */
	append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS1 | FIFOLDST_VLF |
			     FIFOLD_TYPE_AAD | FIFOLD_TYPE_FLUSH1);

	set_jump_tgt_here(desc, zero_assoc_jump_cmd1);

	/* cryptlen = seqoutlen - assoclen */
	append_math_sub(desc, VARSEQINLEN, SEQOUTLEN, REG0, CAAM_CMD_SZ);

	/* jump to zero-payload command if cryptlen is zero */
	zero_payload_jump_cmd = append_jump(desc, JUMP_TEST_ALL |
					    JUMP_COND_MATH_Z);

	append_math_sub(desc, VARSEQOUTLEN, SEQOUTLEN, REG0, CAAM_CMD_SZ);

	/* store encrypted data */
	append_seq_fifo_store(desc, 0, FIFOST_TYPE_MESSAGE_DATA | FIFOLDST_VLF);

	/* read payload data */
	append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS1 | FIFOLDST_VLF |
			     FIFOLD_TYPE_MSG | FIFOLD_TYPE_FLUSH1);

	/* zero-payload command */
	set_jump_tgt_here(desc, zero_payload_jump_cmd);

	/* read ICV */
	append_seq_fifo_load(desc, icvsize, FIFOLD_CLASS_CLASS1 |
			     FIFOLD_TYPE_ICV | FIFOLD_TYPE_LAST1);

#ifdef DEBUG
	print_hex_dump(KERN_ERR, "gcm dec shdesc@" __stringify(__LINE__)": ",
		       DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
#endif
}
EXPORT_SYMBOL(cnstr_shdsc_gcm_decap);

/**
 * cnstr_shdsc_rfc4106_encap - IPSec ESP gcm encapsulation shared descriptor
 *                             (non-protocol).
 * @desc: pointer to buffer used for descriptor construction
 * @cdata: pointer to block cipher transform definitions
 *         Valid algorithm values - OP_ALG_ALGSEL_AES ANDed with OP_ALG_AAI_GCM.
 * @icvsize: integrity check value (ICV) size (truncated or full)
 */
void cnstr_shdsc_rfc4106_encap(u32 * const desc, struct alginfo *cdata,
			       unsigned int icvsize)
{
	u32 *key_jump_cmd;

	init_sh_desc(desc, HDR_SHARE_SERIAL);

	/* Skip key loading if it is loaded due to sharing */
	key_jump_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
				   JUMP_COND_SHRD);
	if (cdata->key_inline)
		append_key_as_imm(desc, cdata->key_virt, cdata->keylen,
				  cdata->keylen, CLASS_1 | KEY_DEST_CLASS_REG);
	else
		append_key(desc, cdata->key_dma, cdata->keylen, CLASS_1 |
			   KEY_DEST_CLASS_REG);
	set_jump_tgt_here(desc, key_jump_cmd);

	/* Class 1 operation */
	append_operation(desc, cdata->algtype | OP_ALG_AS_INITFINAL |
			 OP_ALG_ENCRYPT);

	append_math_sub_imm_u32(desc, VARSEQINLEN, REG3, IMM, 8);
	append_math_add(desc, VARSEQOUTLEN, ZERO, REG3, CAAM_CMD_SZ);

	/* Read assoc data */
	append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS1 | FIFOLDST_VLF |
			     FIFOLD_TYPE_AAD | FIFOLD_TYPE_FLUSH1);

	/* Skip IV */
	append_seq_fifo_load(desc, 8, FIFOLD_CLASS_SKIP);

	/* Will read cryptlen bytes */
	append_math_sub(desc, VARSEQINLEN, SEQINLEN, REG0, CAAM_CMD_SZ);

	/* Workaround for erratum A-005473 (simultaneous SEQ FIFO skips) */
	append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS1 | FIFOLD_TYPE_MSG);

	/* Skip assoc data */
	append_seq_fifo_store(desc, 0, FIFOST_TYPE_SKIP | FIFOLDST_VLF);

	/* cryptlen = seqoutlen - assoclen */
	append_math_sub(desc, VARSEQOUTLEN, VARSEQINLEN, REG0, CAAM_CMD_SZ);

	/* Write encrypted data */
	append_seq_fifo_store(desc, 0, FIFOST_TYPE_MESSAGE_DATA | FIFOLDST_VLF);

	/* Read payload data */
	append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS1 | FIFOLDST_VLF |
			     FIFOLD_TYPE_MSG | FIFOLD_TYPE_LAST1);

	/* Write ICV */
	append_seq_store(desc, icvsize, LDST_CLASS_1_CCB |
			 LDST_SRCDST_BYTE_CONTEXT);

#ifdef DEBUG
	print_hex_dump(KERN_ERR,
		       "rfc4106 enc shdesc@" __stringify(__LINE__)": ",
		       DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
#endif
}
EXPORT_SYMBOL(cnstr_shdsc_rfc4106_encap);

/**
 * cnstr_shdsc_rfc4106_decap - IPSec ESP gcm decapsulation shared descriptor
 *                             (non-protocol).
 * @desc: pointer to buffer used for descriptor construction
 * @cdata: pointer to block cipher transform definitions
 *         Valid algorithm values - OP_ALG_ALGSEL_AES ANDed with OP_ALG_AAI_GCM.
 * @icvsize: integrity check value (ICV) size (truncated or full)
 */
void cnstr_shdsc_rfc4106_decap(u32 * const desc, struct alginfo *cdata,
			       unsigned int icvsize)
{
	u32 *key_jump_cmd;

	init_sh_desc(desc, HDR_SHARE_SERIAL);

	/* Skip key loading if it is loaded due to sharing */
	key_jump_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
				   JUMP_COND_SHRD);
	if (cdata->key_inline)
		append_key_as_imm(desc, cdata->key_virt, cdata->keylen,
				  cdata->keylen, CLASS_1 |
				  KEY_DEST_CLASS_REG);
	else
		append_key(desc, cdata->key_dma, cdata->keylen, CLASS_1 |
			   KEY_DEST_CLASS_REG);
	set_jump_tgt_here(desc, key_jump_cmd);

	/* Class 1 operation */
	append_operation(desc, cdata->algtype | OP_ALG_AS_INITFINAL |
			 OP_ALG_DECRYPT | OP_ALG_ICV_ON);

	append_math_sub_imm_u32(desc, VARSEQINLEN, REG3, IMM, 8);
	append_math_add(desc, VARSEQOUTLEN, ZERO, REG3, CAAM_CMD_SZ);

	/* Read assoc data */
	append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS1 | FIFOLDST_VLF |
			     FIFOLD_TYPE_AAD | FIFOLD_TYPE_FLUSH1);

	/* Skip IV */
	append_seq_fifo_load(desc, 8, FIFOLD_CLASS_SKIP);

	/* Will read cryptlen bytes */
	append_math_sub(desc, VARSEQINLEN, SEQOUTLEN, REG3, CAAM_CMD_SZ);

	/* Workaround for erratum A-005473 (simultaneous SEQ FIFO skips) */
	append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS1 | FIFOLD_TYPE_MSG);

	/* Skip assoc data */
	append_seq_fifo_store(desc, 0, FIFOST_TYPE_SKIP | FIFOLDST_VLF);

	/* Will write cryptlen bytes */
	append_math_sub(desc, VARSEQOUTLEN, SEQOUTLEN, REG0, CAAM_CMD_SZ);

	/* Store payload data */
	append_seq_fifo_store(desc, 0, FIFOST_TYPE_MESSAGE_DATA | FIFOLDST_VLF);

	/* Read encrypted data */
	append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS1 | FIFOLDST_VLF |
			     FIFOLD_TYPE_MSG | FIFOLD_TYPE_FLUSH1);

	/* Read ICV */
	append_seq_fifo_load(desc, icvsize, FIFOLD_CLASS_CLASS1 |
			     FIFOLD_TYPE_ICV | FIFOLD_TYPE_LAST1);

#ifdef DEBUG
	print_hex_dump(KERN_ERR,
		       "rfc4106 dec shdesc@" __stringify(__LINE__)": ",
		       DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
#endif
}
EXPORT_SYMBOL(cnstr_shdsc_rfc4106_decap);

/**
 * cnstr_shdsc_rfc4543_encap - IPSec ESP gmac encapsulation shared descriptor
 *                             (non-protocol).
 * @desc: pointer to buffer used for descriptor construction
 * @cdata: pointer to block cipher transform definitions
 *         Valid algorithm values - OP_ALG_ALGSEL_AES ANDed with OP_ALG_AAI_GCM.
 * @icvsize: integrity check value (ICV) size (truncated or full)
 */
void cnstr_shdsc_rfc4543_encap(u32 * const desc, struct alginfo *cdata,
			       unsigned int icvsize)
{
	u32 *key_jump_cmd, *read_move_cmd, *write_move_cmd;

	init_sh_desc(desc, HDR_SHARE_SERIAL);

	/* Skip key loading if it is loaded due to sharing */
	key_jump_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
				   JUMP_COND_SHRD);
	if (cdata->key_inline)
		append_key_as_imm(desc, cdata->key_virt, cdata->keylen,
				  cdata->keylen, CLASS_1 | KEY_DEST_CLASS_REG);
	else
		append_key(desc, cdata->key_dma, cdata->keylen, CLASS_1 |
			   KEY_DEST_CLASS_REG);
	set_jump_tgt_here(desc, key_jump_cmd);

	/* Class 1 operation */
	append_operation(desc, cdata->algtype | OP_ALG_AS_INITFINAL |
			 OP_ALG_ENCRYPT);

	/* assoclen + cryptlen = seqinlen */
	append_math_sub(desc, REG3, SEQINLEN, REG0, CAAM_CMD_SZ);

	/*
	 * MOVE_LEN opcode is not available in all SEC HW revisions,
	 * thus need to do some magic, i.e. self-patch the descriptor
	 * buffer.
	 */
	read_move_cmd = append_move(desc, MOVE_SRC_DESCBUF | MOVE_DEST_MATH3 |
				    (0x6 << MOVE_LEN_SHIFT));
	write_move_cmd = append_move(desc, MOVE_SRC_MATH3 | MOVE_DEST_DESCBUF |
				     (0x8 << MOVE_LEN_SHIFT));

	/* Will read assoclen + cryptlen bytes */
	append_math_sub(desc, VARSEQINLEN, SEQINLEN, REG0, CAAM_CMD_SZ);

	/* Will write assoclen + cryptlen bytes */
	append_math_sub(desc, VARSEQOUTLEN, SEQINLEN, REG0, CAAM_CMD_SZ);

	/* Read and write assoclen + cryptlen bytes */
	aead_append_src_dst(desc, FIFOLD_TYPE_AAD);

	set_move_tgt_here(desc, read_move_cmd);
	set_move_tgt_here(desc, write_move_cmd);
	append_cmd(desc, CMD_LOAD | DISABLE_AUTO_INFO_FIFO);
	/* Move payload data to OFIFO */
	append_move(desc, MOVE_SRC_INFIFO_CL | MOVE_DEST_OUTFIFO);

	/* Write ICV */
	append_seq_store(desc, icvsize, LDST_CLASS_1_CCB |
			 LDST_SRCDST_BYTE_CONTEXT);

#ifdef DEBUG
	print_hex_dump(KERN_ERR,
		       "rfc4543 enc shdesc@" __stringify(__LINE__)": ",
		       DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
#endif
}
EXPORT_SYMBOL(cnstr_shdsc_rfc4543_encap);

/**
 * cnstr_shdsc_rfc4543_decap - IPSec ESP gmac decapsulation shared descriptor
 *                             (non-protocol).
 * @desc: pointer to buffer used for descriptor construction
 * @cdata: pointer to block cipher transform definitions
 *         Valid algorithm values - OP_ALG_ALGSEL_AES ANDed with OP_ALG_AAI_GCM.
 * @icvsize: integrity check value (ICV) size (truncated or full)
 */
void cnstr_shdsc_rfc4543_decap(u32 * const desc, struct alginfo *cdata,
			       unsigned int icvsize)
{
	u32 *key_jump_cmd, *read_move_cmd, *write_move_cmd;

	init_sh_desc(desc, HDR_SHARE_SERIAL);

	/* Skip key loading if it is loaded due to sharing */
	key_jump_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
				   JUMP_COND_SHRD);
	if (cdata->key_inline)
		append_key_as_imm(desc, cdata->key_virt, cdata->keylen,
				  cdata->keylen, CLASS_1 | KEY_DEST_CLASS_REG);
	else
		append_key(desc, cdata->key_dma, cdata->keylen, CLASS_1 |
			   KEY_DEST_CLASS_REG);
	set_jump_tgt_here(desc, key_jump_cmd);

	/* Class 1 operation */
	append_operation(desc, cdata->algtype | OP_ALG_AS_INITFINAL |
			 OP_ALG_DECRYPT | OP_ALG_ICV_ON);

	/* assoclen + cryptlen = seqoutlen */
	append_math_sub(desc, REG3, SEQOUTLEN, REG0, CAAM_CMD_SZ);

	/*
	 * MOVE_LEN opcode is not available in all SEC HW revisions,
	 * thus need to do some magic, i.e. self-patch the descriptor
	 * buffer.
	 */
	read_move_cmd = append_move(desc, MOVE_SRC_DESCBUF | MOVE_DEST_MATH3 |
				    (0x6 << MOVE_LEN_SHIFT));
	write_move_cmd = append_move(desc, MOVE_SRC_MATH3 | MOVE_DEST_DESCBUF |
				     (0x8 << MOVE_LEN_SHIFT));

	/* Will read assoclen + cryptlen bytes */
	append_math_sub(desc, VARSEQINLEN, SEQOUTLEN, REG0, CAAM_CMD_SZ);

	/* Will write assoclen + cryptlen bytes */
	append_math_sub(desc, VARSEQOUTLEN, SEQOUTLEN, REG0, CAAM_CMD_SZ);

	/* Store payload data */
	append_seq_fifo_store(desc, 0, FIFOST_TYPE_MESSAGE_DATA | FIFOLDST_VLF);

	/* In-snoop assoclen + cryptlen data */
	append_seq_fifo_load(desc, 0, FIFOLD_CLASS_BOTH | FIFOLDST_VLF |
			     FIFOLD_TYPE_AAD | FIFOLD_TYPE_LAST2FLUSH1);

	set_move_tgt_here(desc, read_move_cmd);
	set_move_tgt_here(desc, write_move_cmd);
	append_cmd(desc, CMD_LOAD | DISABLE_AUTO_INFO_FIFO);
	/* Move payload data to OFIFO */
	append_move(desc, MOVE_SRC_INFIFO_CL | MOVE_DEST_OUTFIFO);
	append_cmd(desc, CMD_LOAD | ENABLE_AUTO_INFO_FIFO);

	/* Read ICV */
	append_seq_fifo_load(desc, icvsize, FIFOLD_CLASS_CLASS1 |
			     FIFOLD_TYPE_ICV | FIFOLD_TYPE_LAST1);

#ifdef DEBUG
	print_hex_dump(KERN_ERR,
		       "rfc4543 dec shdesc@" __stringify(__LINE__)": ",
		       DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
#endif
}
EXPORT_SYMBOL(cnstr_shdsc_rfc4543_decap);

/*
 * For ablkcipher encrypt and decrypt, read from req->src and
 * write to req->dst
 */
static inline void ablkcipher_append_src_dst(u32 *desc)
{
	append_math_add(desc, VARSEQOUTLEN, SEQINLEN, REG0, CAAM_CMD_SZ);
	append_math_add(desc, VARSEQINLEN, SEQINLEN, REG0, CAAM_CMD_SZ);
	append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS1 |
			     KEY_VLF | FIFOLD_TYPE_MSG | FIFOLD_TYPE_LAST1);
	append_seq_fifo_store(desc, 0, FIFOST_TYPE_MESSAGE_DATA | KEY_VLF);
}

/**
 * cnstr_shdsc_ablkcipher_encap - ablkcipher encapsulation shared descriptor
 * @desc: pointer to buffer used for descriptor construction
 * @cdata: pointer to block cipher transform definitions
 *         Valid algorithm values - one of OP_ALG_ALGSEL_{AES, DES, 3DES} ANDed
 *         with OP_ALG_AAI_CBC or OP_ALG_AAI_CTR_MOD128.
 * @ivsize: initialization vector size
 * @is_rfc3686: true when ctr(aes) is wrapped by rfc3686 template
 * @ctx1_iv_off: IV offset in CONTEXT1 register
 */
void cnstr_shdsc_ablkcipher_encap(u32 * const desc, struct alginfo *cdata,
				  unsigned int ivsize, const bool is_rfc3686,
				  const u32 ctx1_iv_off)
{
	u32 *key_jump_cmd;

	init_sh_desc(desc, HDR_SHARE_SERIAL | HDR_SAVECTX);
	/* Skip if already shared */
	key_jump_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
				   JUMP_COND_SHRD);

	/* Load class1 key only */
	append_key_as_imm(desc, cdata->key_virt, cdata->keylen,
			  cdata->keylen, CLASS_1 | KEY_DEST_CLASS_REG);

	/* Load nonce into CONTEXT1 reg */
	if (is_rfc3686) {
		u8 *nonce = cdata->key_virt + cdata->keylen;

		append_load_as_imm(desc, nonce, CTR_RFC3686_NONCE_SIZE,
				   LDST_CLASS_IND_CCB |
				   LDST_SRCDST_BYTE_OUTFIFO | LDST_IMM);
		append_move(desc, MOVE_WAITCOMP | MOVE_SRC_OUTFIFO |
			    MOVE_DEST_CLASS1CTX | (16 << MOVE_OFFSET_SHIFT) |
			    (CTR_RFC3686_NONCE_SIZE << MOVE_LEN_SHIFT));
	}

	set_jump_tgt_here(desc, key_jump_cmd);

	/* Load iv */
	append_seq_load(desc, ivsize, LDST_SRCDST_BYTE_CONTEXT |
			LDST_CLASS_1_CCB | (ctx1_iv_off << LDST_OFFSET_SHIFT));

	/* Load counter into CONTEXT1 reg */
	if (is_rfc3686)
		append_load_imm_be32(desc, 1, LDST_IMM | LDST_CLASS_1_CCB |
				     LDST_SRCDST_BYTE_CONTEXT |
				     ((ctx1_iv_off + CTR_RFC3686_IV_SIZE) <<
				      LDST_OFFSET_SHIFT));

	/* Load operation */
	append_operation(desc, cdata->algtype | OP_ALG_AS_INITFINAL |
			 OP_ALG_ENCRYPT);

	/* Perform operation */
	ablkcipher_append_src_dst(desc);

#ifdef DEBUG
	print_hex_dump(KERN_ERR,
		       "ablkcipher enc shdesc@" __stringify(__LINE__)": ",
		       DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
#endif
}
EXPORT_SYMBOL(cnstr_shdsc_ablkcipher_encap);

/**
 * cnstr_shdsc_ablkcipher_decap - ablkcipher decapsulation shared descriptor
 * @desc: pointer to buffer used for descriptor construction
 * @cdata: pointer to block cipher transform definitions
 *         Valid algorithm values - one of OP_ALG_ALGSEL_{AES, DES, 3DES} ANDed
 *         with OP_ALG_AAI_CBC or OP_ALG_AAI_CTR_MOD128.
 * @ivsize: initialization vector size
 * @is_rfc3686: true when ctr(aes) is wrapped by rfc3686 template
 * @ctx1_iv_off: IV offset in CONTEXT1 register
 */
void cnstr_shdsc_ablkcipher_decap(u32 * const desc, struct alginfo *cdata,
				  unsigned int ivsize, const bool is_rfc3686,
				  const u32 ctx1_iv_off)
{
	u32 *key_jump_cmd;

	init_sh_desc(desc, HDR_SHARE_SERIAL | HDR_SAVECTX);
	/* Skip if already shared */
	key_jump_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
				   JUMP_COND_SHRD);

	/* Load class1 key only */
	append_key_as_imm(desc, cdata->key_virt, cdata->keylen,
			  cdata->keylen, CLASS_1 | KEY_DEST_CLASS_REG);

	/* Load nonce into CONTEXT1 reg */
	if (is_rfc3686) {
		u8 *nonce = cdata->key_virt + cdata->keylen;

		append_load_as_imm(desc, nonce, CTR_RFC3686_NONCE_SIZE,
				   LDST_CLASS_IND_CCB |
				   LDST_SRCDST_BYTE_OUTFIFO | LDST_IMM);
		append_move(desc, MOVE_WAITCOMP | MOVE_SRC_OUTFIFO |
			    MOVE_DEST_CLASS1CTX | (16 << MOVE_OFFSET_SHIFT) |
			    (CTR_RFC3686_NONCE_SIZE << MOVE_LEN_SHIFT));
	}

	set_jump_tgt_here(desc, key_jump_cmd);

	/* load IV */
	append_seq_load(desc, ivsize, LDST_SRCDST_BYTE_CONTEXT |
			LDST_CLASS_1_CCB | (ctx1_iv_off << LDST_OFFSET_SHIFT));

	/* Load counter into CONTEXT1 reg */
	if (is_rfc3686)
		append_load_imm_be32(desc, 1, LDST_IMM | LDST_CLASS_1_CCB |
				     LDST_SRCDST_BYTE_CONTEXT |
				     ((ctx1_iv_off + CTR_RFC3686_IV_SIZE) <<
				      LDST_OFFSET_SHIFT));

	/* Choose operation */
	if (ctx1_iv_off)
		append_operation(desc, cdata->algtype | OP_ALG_AS_INITFINAL |
				 OP_ALG_DECRYPT);
	else
		append_dec_op1(desc, cdata->algtype);

	/* Perform operation */
	ablkcipher_append_src_dst(desc);

#ifdef DEBUG
	print_hex_dump(KERN_ERR,
		       "ablkcipher dec shdesc@" __stringify(__LINE__)": ",
		       DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
#endif
}
EXPORT_SYMBOL(cnstr_shdsc_ablkcipher_decap);

/**
 * cnstr_shdsc_ablkcipher_givencap - ablkcipher encapsulation shared descriptor
 *                                   with HW-generated initialization vector.
 * @desc: pointer to buffer used for descriptor construction
 * @cdata: pointer to block cipher transform definitions
 *         Valid algorithm values - one of OP_ALG_ALGSEL_{AES, DES, 3DES} ANDed
 *         with OP_ALG_AAI_CBC.
 * @ivsize: initialization vector size
 * @is_rfc3686: true when ctr(aes) is wrapped by rfc3686 template
 * @ctx1_iv_off: IV offset in CONTEXT1 register
 */
void cnstr_shdsc_ablkcipher_givencap(u32 * const desc, struct alginfo *cdata,
				     unsigned int ivsize, const bool is_rfc3686,
				     const u32 ctx1_iv_off)
{
	u32 *key_jump_cmd, geniv;

	init_sh_desc(desc, HDR_SHARE_SERIAL | HDR_SAVECTX);
	/* Skip if already shared */
	key_jump_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
				   JUMP_COND_SHRD);

	/* Load class1 key only */
	append_key_as_imm(desc, cdata->key_virt, cdata->keylen,
			  cdata->keylen, CLASS_1 | KEY_DEST_CLASS_REG);

	/* Load Nonce into CONTEXT1 reg */
	if (is_rfc3686) {
		u8 *nonce = cdata->key_virt + cdata->keylen;

		append_load_as_imm(desc, nonce, CTR_RFC3686_NONCE_SIZE,
				   LDST_CLASS_IND_CCB |
				   LDST_SRCDST_BYTE_OUTFIFO | LDST_IMM);
		append_move(desc, MOVE_WAITCOMP | MOVE_SRC_OUTFIFO |
			    MOVE_DEST_CLASS1CTX | (16 << MOVE_OFFSET_SHIFT) |
			    (CTR_RFC3686_NONCE_SIZE << MOVE_LEN_SHIFT));
	}
	set_jump_tgt_here(desc, key_jump_cmd);

	/* Generate IV */
	geniv = NFIFOENTRY_STYPE_PAD | NFIFOENTRY_DEST_DECO |
		NFIFOENTRY_DTYPE_MSG | NFIFOENTRY_LC1 | NFIFOENTRY_PTYPE_RND |
		(ivsize << NFIFOENTRY_DLEN_SHIFT);
	append_load_imm_u32(desc, geniv, LDST_CLASS_IND_CCB |
			    LDST_SRCDST_WORD_INFO_FIFO | LDST_IMM);
	append_cmd(desc, CMD_LOAD | DISABLE_AUTO_INFO_FIFO);
	append_move(desc, MOVE_WAITCOMP | MOVE_SRC_INFIFO |
		    MOVE_DEST_CLASS1CTX | (ivsize << MOVE_LEN_SHIFT) |
		    (ctx1_iv_off << MOVE_OFFSET_SHIFT));
	append_cmd(desc, CMD_LOAD | ENABLE_AUTO_INFO_FIFO);

	/* Copy generated IV to memory */
	append_seq_store(desc, ivsize, LDST_SRCDST_BYTE_CONTEXT |
			 LDST_CLASS_1_CCB | (ctx1_iv_off << LDST_OFFSET_SHIFT));

	/* Load Counter into CONTEXT1 reg */
	if (is_rfc3686)
		append_load_imm_be32(desc, 1, LDST_IMM | LDST_CLASS_1_CCB |
				     LDST_SRCDST_BYTE_CONTEXT |
				     ((ctx1_iv_off + CTR_RFC3686_IV_SIZE) <<
				      LDST_OFFSET_SHIFT));

	if (ctx1_iv_off)
		append_jump(desc, JUMP_JSL | JUMP_TEST_ALL | JUMP_COND_NCP |
			    (1 << JUMP_OFFSET_SHIFT));

	/* Load operation */
	append_operation(desc, cdata->algtype | OP_ALG_AS_INITFINAL |
			 OP_ALG_ENCRYPT);

	/* Perform operation */
	ablkcipher_append_src_dst(desc);

#ifdef DEBUG
	print_hex_dump(KERN_ERR,
		       "ablkcipher givenc shdesc@" __stringify(__LINE__) ": ",
		       DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
#endif
}
EXPORT_SYMBOL(cnstr_shdsc_ablkcipher_givencap);

/**
 * cnstr_shdsc_xts_ablkcipher_encap - xts ablkcipher encapsulation shared
 *                                    descriptor
 * @desc: pointer to buffer used for descriptor construction
 * @cdata: pointer to block cipher transform definitions
 *         Valid algorithm values - OP_ALG_ALGSEL_AES ANDed with OP_ALG_AAI_XTS.
 */
void cnstr_shdsc_xts_ablkcipher_encap(u32 * const desc, struct alginfo *cdata)
{
	__be64 sector_size = cpu_to_be64(512);
	u32 *key_jump_cmd;

	init_sh_desc(desc, HDR_SHARE_SERIAL | HDR_SAVECTX);
	/* Skip if already shared */
	key_jump_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
				   JUMP_COND_SHRD);

	/* Load class1 keys only */
	append_key_as_imm(desc, cdata->key_virt, cdata->keylen,
			  cdata->keylen, CLASS_1 | KEY_DEST_CLASS_REG);

	/* Load sector size with index 40 bytes (0x28) */
	append_load_as_imm(desc, (void *)&sector_size, 8, LDST_CLASS_1_CCB |
			   LDST_SRCDST_BYTE_CONTEXT |
			   (0x28 << LDST_OFFSET_SHIFT));

	set_jump_tgt_here(desc, key_jump_cmd);

	/*
	 * create sequence for loading the sector index
	 * Upper 8B of IV - will be used as sector index
	 * Lower 8B of IV - will be discarded
	 */
	append_seq_load(desc, 8, LDST_SRCDST_BYTE_CONTEXT | LDST_CLASS_1_CCB |
			(0x20 << LDST_OFFSET_SHIFT));
	append_seq_fifo_load(desc, 8, FIFOLD_CLASS_SKIP);

	/* Load operation */
	append_operation(desc, cdata->algtype | OP_ALG_AS_INITFINAL |
			 OP_ALG_ENCRYPT);

	/* Perform operation */
	ablkcipher_append_src_dst(desc);

#ifdef DEBUG
	print_hex_dump(KERN_ERR,
		       "xts ablkcipher enc shdesc@" __stringify(__LINE__) ": ",
		       DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
#endif
}
EXPORT_SYMBOL(cnstr_shdsc_xts_ablkcipher_encap);

/**
 * cnstr_shdsc_xts_ablkcipher_decap - xts ablkcipher decapsulation shared
 *                                    descriptor
 * @desc: pointer to buffer used for descriptor construction
 * @cdata: pointer to block cipher transform definitions
 *         Valid algorithm values - OP_ALG_ALGSEL_AES ANDed with OP_ALG_AAI_XTS.
 */
void cnstr_shdsc_xts_ablkcipher_decap(u32 * const desc, struct alginfo *cdata)
{
	__be64 sector_size = cpu_to_be64(512);
	u32 *key_jump_cmd;

	init_sh_desc(desc, HDR_SHARE_SERIAL | HDR_SAVECTX);
	/* Skip if already shared */
	key_jump_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
				   JUMP_COND_SHRD);

	/* Load class1 key only */
	append_key_as_imm(desc, cdata->key_virt, cdata->keylen,
			  cdata->keylen, CLASS_1 | KEY_DEST_CLASS_REG);

	/* Load sector size with index 40 bytes (0x28) */
	append_load_as_imm(desc, (void *)&sector_size, 8, LDST_CLASS_1_CCB |
			   LDST_SRCDST_BYTE_CONTEXT |
			   (0x28 << LDST_OFFSET_SHIFT));

	set_jump_tgt_here(desc, key_jump_cmd);

	/*
	 * create sequence for loading the sector index
	 * Upper 8B of IV - will be used as sector index
	 * Lower 8B of IV - will be discarded
	 */
	append_seq_load(desc, 8, LDST_SRCDST_BYTE_CONTEXT | LDST_CLASS_1_CCB |
			(0x20 << LDST_OFFSET_SHIFT));
	append_seq_fifo_load(desc, 8, FIFOLD_CLASS_SKIP);

	/* Load operation */
	append_dec_op1(desc, cdata->algtype);

	/* Perform operation */
	ablkcipher_append_src_dst(desc);

#ifdef DEBUG
	print_hex_dump(KERN_ERR,
		       "xts ablkcipher dec shdesc@" __stringify(__LINE__) ": ",
		       DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
#endif
}
EXPORT_SYMBOL(cnstr_shdsc_xts_ablkcipher_decap);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("FSL CAAM descriptor support");
MODULE_AUTHOR("Freescale Semiconductor - NMG/STC");